I want my app to detect the internet connection loss automatically. So im using the following code.
- (void)applicationDidBecomeActive:(UIApplication *)application {
Reachability *networkReachability = [Reachability reachabilityForInternetConnection];
NetworkStatus networkStatus = [networkReachability currentReachabilityStatus];
if (networkStatus == NotReachable) {
[Settings hideSpinner];
//Show no internet connectivity dialog.
} else {
}
}
But the problem is that it is not checking the internet connectivity continually. it checks only when the app has become active. How can I be able to check for internet connection continually throughout the app life cycle and throw an warning if internet goes off automatically?
Add obeserver like this in Reachability method.
1) [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotification object:nil];
It will call automatically when your app open/in background mode and it call reachabilityChanged.
2) [[NSNotificationCenter defaultCenter] postNotificationName:@"ChangeInternetConnection" object:nil];
ChangeInternetConnection you have to add observer to your ViewController to get status when internet changing it's status.
- (void) checkInternetConnetion {
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reachabilityChanged:) name:kReachabilityChangedNotification object:nil];
//NSString *remoteHostName = @"www.apple.com";
self.internetReachability = [Reachability reachabilityForInternetConnection];
[self.internetReachability startNotifier];
[self updateInterfaceWithReachability:self.internetReachability];
}
#pragma mark - Reachability Methods
- (void)updateInterfaceWithReachability:(Reachability *)reachability {
if (reachability == self.internetReachability) {
[self checkStatus:reachability];
}
if (reachability == self.wifiReachability) {
[self checkStatus:reachability];
}
}
-(void)checkStatus :(Reachability *)reachability {
NetworkStatus netStatus = [reachability currentReachabilityStatus];
BOOL connectionRequired = [reachability connectionRequired];
NSString* statusString = @"";
switch (netStatus) {
case NotReachable: {
self.isInternetOn = FALSE;
break;
}
case ReachableViaWWAN: {
self.isInternetOn = TRUE;
break;
}
case ReachableViaWiFi: {
self.isInternetOn = TRUE;
break;
}
}
[[NSNotificationCenter defaultCenter] postNotificationName:@"ChangeInternetConnection" object:nil];
}
- (void) reachabilityChanged:(NSNotification *)note {
Reachability* curReach = [note object];
NSParameterAssert([curReach isKindOfClass:[Reachability class]]);
[self updateInterfaceWithReachability:curReach];
}